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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <h1 style="text-align:center">This is a heading</h1>
    <p>this is a paragraph</p>
    <hr>
    <p sytle="background-color:yellow">this is another paragraph</p>
    <hr>//hr的意思就是下划线
    <p>this is</p>  <br> //br的意思就是换行 <p>thies is </p>
    <p>this is </p>  <p>this is anthoer</p>
    <address>
        witten by Donald Duck.<br>
        visit us at:<br>
        
    </address>
    
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